Preheat the air fryer to 380°F (190°C).

In a bowl, combine the olive oil, garlic powder, smoked paprika, dried oregano, salt, and pepper to create a marinade.

Coat the chicken breasts in the marinade, ensuring they are well covered. Let them marinate for at least 5 minutes.

Place the marinated chicken breasts in the air fryer basket in a single layer.

Cook the chicken for 15 minutes, flipping halfway through the cooking time.

Check for doneness; the internal temperature should reach 165°F (75°C). If needed, cook for an additional 2-5 minutes.

While the chicken is cooking, warm the cooked buckwheat in a small pot or microwave.

Once the chicken is cooked, let it rest for 5 minutes before slicing.

Serve the sliced chicken over a bed of warm buckwheat and garnish with fresh parsley if desired.